I am an RN who is a wanna be Vet Tech. I would agree that it looks as if something is sticking in, as opposed to, sticking out. I do also agree that it looks like a really hard feather as well.
Take him to a vet ASAP. If that's not realistic for you...
My suggestion is to get some pliers and boil them (to sterilize,) get some super glue, normal saline, prophylactic antibiotics, clean rags, and an appropriate antimicrobial solution from your feed and seed and start the roo on them prior to the procedure. Clean the area thoroughly with the antimicrobe. Pull the the object out with your clean pliers. If you cannot remove it with minimal difficulty I would leave it alone. Especially if it feels as if it's attached to something inside the body. If you get the object out, flush the wound with normal saline. Apply pressure to clot the bleeding. Clean the area with the antimicrobe again. Super glue the wound shut. Take care not to let any feathers get in the wound or it will not heal. Isolate the bird a couple days so he can heal.
Best solution and if you attempt this, have some help/extra hands in the event it's needed. Then PLEASE let update us.